syzkaller login: [ 30.920341] BUG: Bad rss-counter state mm:000000007efd03d4 type:MM_FILEPAGES val:33 [ 30.921866] BUG: Bad rss-counter state mm:000000007efd03d4 type:MM_ANONPAGES val:22 [ 31.135570] ================================================================== [ 31.136305] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.137072] Read of size 8 at addr ffff88800d5eded8 by task sshd/220 [ 31.137686] [ 31.137859] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.138610] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.139411] Call Trace: [ 31.139663] [ 31.139889] dump_stack_lvl+0x91/0xf0 [ 31.140281] print_report+0xcc/0x620 [ 31.140701] ? __virt_addr_valid+0x102/0x340 [ 31.141153] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.141647] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.142140] kasan_report+0xbe/0xf0 [ 31.142521] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.143013] vma_interval_tree_remove+0xc75/0xec0 [ 31.143499] vma_prepare+0xc54/0x11a0 [ 31.143900] __split_vma+0x5af/0x950 [ 31.144278] ? __pfx___split_vma+0x10/0x10 [ 31.144720] ? find_held_lock+0x2c/0x110 [ 31.145105] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.145514] ? lock_is_held_type+0x9f/0x120 [ 31.145911] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.146357] ? mtree_range_walk+0x632/0x900 [ 31.146766] ? mas_walk+0x5c7/0x7c0 [ 31.147115] do_vmi_munmap+0x1f1/0x2b0 [ 31.147472] mmap_region+0x1f9/0x2660 [ 31.147822] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.148197] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.148738] ? __pfx_lock_acquire+0x10/0x10 [ 31.149131] ? __pfx_mmap_region+0x10/0x10 [ 31.149520] ? security_mmap_addr+0x7d/0xa0 [ 31.149911] ? get_unmapped_area+0x1f5/0x3f0 [ 31.150309] do_mmap+0x854/0xf00 [ 31.150632] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.150991] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.151404] ksys_mmap_pgoff+0x3af/0x500 [ 31.151775] do_syscall_64+0x3f/0x90 [ 31.152125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.152626] RIP: 0033:0x7f9118d2ed82 [ 31.152962] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.154488] RSP: 002b:00007ffcd674db58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.155140] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9118d2ed82 [ 31.155752] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9118168000 [ 31.156368] RBP: 00007f9118168000 R08: 0000000000000009 R09: 0000000000001000 [ 31.157004] R10: 0000000000000812 R11: 0000000000000206 R12: 000055555ab63ec0 [ 31.157617] R13: 00007ffcd674db70 R14: 00007ffcd674dba0 R15: 00007ffcd674df00 [ 31.158243] [ 31.158456] [ 31.158615] Allocated by task 213: [ 31.158930] kasan_save_stack+0x22/0x50 [ 31.159303] kasan_set_track+0x25/0x30 [ 31.159662] __kasan_slab_alloc+0x59/0x70 [ 31.160042] kmem_cache_alloc+0x16b/0x370 [ 31.160417] vm_area_dup+0x20/0x160 [ 31.160785] __split_vma+0x170/0x950 [ 31.161127] split_vma+0xc6/0x110 [ 31.161448] mprotect_fixup+0x8d2/0xb30 [ 31.161816] do_mprotect_pkey+0x87e/0xd40 [ 31.162194] __x64_sys_mprotect+0x78/0xc0 [ 31.162575] do_syscall_64+0x3f/0x90 [ 31.162921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.163388] [ 31.163546] Freed by task 213: [ 31.163834] kasan_save_stack+0x22/0x50 [ 31.164199] kasan_set_track+0x25/0x30 [ 31.164586] kasan_save_free_info+0x2b/0x50 [ 31.164976] __kasan_slab_free+0x10a/0x190 [ 31.165363] kmem_cache_free+0x10d/0x4d0 [ 31.165735] rcu_core+0x8c8/0x2860 [ 31.166060] __do_softirq+0x1b7/0x7d4 [ 31.166409] [ 31.166569] Last potentially related work creation: [ 31.166995] kasan_save_stack+0x22/0x50 [ 31.167363] __kasan_record_aux_stack+0x8e/0xa0 [ 31.167781] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.168249] remove_vma+0x139/0x170 [ 31.168599] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.169004] do_vmi_munmap+0x1f1/0x2b0 [ 31.169356] __vm_munmap+0x138/0x3a0 [ 31.169700] __x64_sys_munmap+0x59/0x80 [ 31.170063] do_syscall_64+0x3f/0x90 [ 31.170410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.170877] [ 31.171034] Second to last potentially related work creation: [ 31.171533] kasan_save_stack+0x22/0x50 [ 31.171901] __kasan_record_aux_stack+0x8e/0xa0 [ 31.172317] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.172819] remove_vma+0x139/0x170 [ 31.173150] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.173554] do_vmi_munmap+0x1f1/0x2b0 [ 31.173908] mmap_region+0x1f9/0x2660 [ 31.174256] do_mmap+0x854/0xf00 [ 31.174573] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.174943] ksys_mmap_pgoff+0x3af/0x500 [ 31.175338] do_syscall_64+0x3f/0x90 [ 31.175716] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.176234] [ 31.176406] The buggy address belongs to the object at ffff88800d5ede80 [ 31.176406] which belongs to the cache vm_area_struct of size 168 [ 31.177617] The buggy address is located 88 bytes inside of [ 31.177617] freed 168-byte region [ffff88800d5ede80, ffff88800d5edf28) [ 31.178754] [ 31.178927] The buggy address belongs to the physical page: [ 31.179459] page:000000009a00ecf9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5ed [ 31.180407] memcg:ffff8880144a0b01 [ 31.180769] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.181343] page_type: 0xffffffff() [ 31.181701] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.182447] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144a0b01 [ 31.183171] page dumped because: kasan: bad access detected [ 31.183712] [ 31.183888] Memory state around the buggy address: [ 31.184353] ffff88800d5edd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.185080] ffff88800d5ede00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.185771] >ffff88800d5ede80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.186450] ^ [ 31.187047] ffff88800d5edf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.187739] ffff88800d5edf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.188424] ================================================================== [ 31.189203] Disabling lock debugging due to kernel taint [ 33.996681] BUG: Bad rss-counter state mm:0000000005e88b3e type:MM_FILEPAGES val:33 [ 33.997608] BUG: Bad rss-counter state mm:0000000005e88b3e type:MM_ANONPAGES val:22 [ 34.556578] BUG: Bad rss-counter state mm:000000000723f57c type:MM_FILEPAGES val:33 [ 34.557812] BUG: Bad rss-counter state mm:000000000723f57c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16342' (ECDSA) to the list of known hosts. 2023/06/20 18:55:35 fuzzer started 2023/06/20 18:55:35 dialing manager at localhost:36067 2023/06/20 18:55:35 checking machine... 2023/06/20 18:55:35 checking revisions... [ 35.173547] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:55:36 testing simple program... [ 35.220029] cgroup: Unknown subsys name 'net' [ 35.259394] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:55:35 Registers: info registers vcpu 0 RAX=ffffffff83650bf8 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002b97f37 RSI=ffffffff83650bf8 RDI=ffff888015cbfa28 RBP=ffff888015cbf9f8 RSP=ffff888015cbf958 R8 =0000000000000001 R9 =ffff888015cbf9a0 R10=0000000000038001 R11=000000000008ad19 R12=ffff888015cbfa28 R13=0000000000000000 R14=ffff88800e9f8000 R15=0000000000000001 RIP=ffffffff84538440 RFL=00000282 [--S----] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8e2fd41900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f8e302f8618 CR3=000000001472e000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f4df0c42a98 CR3=000000000e9c0000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2035333a35353a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a35353a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000